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Hui LIU 《等离子体科学和技术》2019,21(4):45502
Previous studies have shown that leak electrons in cusped field thrusters can move along the channel axis to the anode after crossing the magnetic cusp on the exit. In this paper, a one- dimensional fluid model is built along two typical electron paths to study the influence of leak electrons on the discharge characteristics of a cusped field thruster, considering the electron temperature equation. It is found that the frequencies of low-frequency oscillations increase with a decrease in the proportion of leak electrons, which is related to an increase in the ion speed in the channel. Simulation results show that the position of the peak electron temperature is near the magnetic cusp on the exit and the position of the peak electron density is located downstream from the middle magnetic tip. With a decrease in the proportion of the leak electrons, the peak electron temperature and peak electron density decrease and the position of the peak electron density moves away from the exit, which is related to a decrease in the potential fall on the exit and an increase in confinement of electrons to the middle magnetic cusp. 相似文献
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笔者受山东传统名菜“九转大肠”和山西榆次厨师庞煜的“红果大肠”的启发,创制出“茄汁香蕉大肠”一菜。它是将大肠煮熟后切成段,再瓤入香蕉,然后经油炸定形,最后用茄汁火靠 入味制成的。成菜色泽鲜艳,火巴 软柔糯,酸甜适口,是一款受人欢迎的佳肴。原料:猪大肠650克 香蕉4只 鸡蛋2个 生姜20克 大葱50克 番茄酱75克 蒜末15克 精盐、料酒、白糖、醋、味精、香油、红油、面粉、干湿淀粉各适量 色拉油1500克(约耗75克) 点缀物少许制法:1.取猪大肠中段治净,放入清水锅中,加入生姜(拍破)、大葱(挽结)、料酒,用中火将大肠煮熟后捞出,… 相似文献
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高效液相色谱法测定卤虫卵中海藻糖和甘油的含量 总被引:1,自引:0,他引:1
建立了同时测定卤虫卵中海藻糖和甘油的含量的方法.采用Asahipeak Amino NH2P-504E色谱柱(250 mm×4.6 mm),示差检测器,以乙腈-水(70:30)为流动相,流速为1.0 mL/min,利用HPLC方法,8 min内完成海藻糖和甘油的基线分离.并将该方法应用于两种产地卤虫卵中海藻糖和甘油含量的测定,方法简便、快速,重现性良好. 相似文献
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